without a sign or words to show what or where something is compare marked无标志的;无标记的;无记号的 - (especially British English)
(of a player in a team game, especially football (soccer) )比赛队员,尤指足球运动员 with no player from the other team staying close to prevent them from getting the ball 无人盯防的 He headed the ball to the unmarked Gray. 他把球顶给了无人盯防的格雷。 She was unmarked, six yards from goal. 她没有被标记,离球门6码。
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linguistics )语言学 (of a word or form of a word )词或词形 not showing any particular feature or style, such as being formal or informal opposite marked无标记的